Features
•Incorporates the ARM7TDMI® ARM® Thumb® Processor Core
– High-performance 32-bit RISC Architecture
– High-density 16-bit Instruction Set
– Leader in MIPS/Watt
– Little-endian
– EmbeddedICE™ (In-circuit Emulation)
•8-, 16- and 32-bit Read and Write Support
•256K Bytes of On-chip SRAM
– 32-bit Data Bus
– Single-clock Cycle Access
•Fully Programmable External Bus Interface (EBI)
– Maximum External Address Space of 64M Bytes
– Up to Eight Chip Selects
– Software Programmable 8/16-bit External Data Bus
•Eight-level Priority, Individually Maskable, Vectored Interrupt Controller
– Four External Interrupts, including a High-priority, Low-latency Interrupt Request
•32 Programmable I/O Lines
•Three-channel 16-bit Timer/Counter
– Three External Clock Inputs
– Two Multi-purpose I/O Pins per Channel
•Two USARTs
– Two Dedicated Peripheral Data Controller (PDC) Channels per USART
•Programmable Watchdog Timer
•Advanced Power-saving Features
– CPU and Peripheral Can be Deactivated Individually
•Fully Static Operation:
– 0 Hz to 75 MHz Internal Frequency Range at VDDCORE = 1.8V, 85°C
•2.7V to 3.6V I/O Operating Range
•1.65V to 1.95V Core Operating Range
•-40°C to +85°C Temperature Range
•Available in 100-lead LQFP Package (Green)
1. Description
The AT91R40008 microcontroller is a member of the Atmel AT91 16/32-bit microcon-
troller family, which is based on the ARM7TDMI processor core. This processor has a
high-performance, 32-bit RISC architecture with a high-density, 16-bit instruction set
and very low power consumption. Furthermore, it features 256K bytes of on-chip
SRAM and a large number of internally banked registers, resulting in very fast excep-
tion handling, and making the device ideal for real-time control applications.
The AT91R40008 microcontroller features a direct connection to off-chip memory,
including Flash, through the fully programmable External Bus Interface (EBI). An 8-
level priority vectored interrupt controller, in conjunction with the Peripheral Data Con-
troller, significantly improves the real-time performance of the device.
The device is manufactured using Atmel’s high-density CMOS technology. By com-
bining the ARM7TDMI processor core with a large, on-chip, high-speed SRAM and a
wide range of peripheral functions on a monolithic chip, the AT91R40008 is a powerful
microcontroller that offers a flexible and high-performance solution to many compute-
intensive embedded control applications.
AT91 ARM
Thumb-based
Microcontroller
AT91R40008
Summary
Note: This is a summary document. A complete document
is available on our Web site at www.atmel.com.
http://www.atmel.com/dyn/resources/prod_documents/doc
1354.pdf
1732FS–ATARM–12-Apr-06